India, Nov. 7 -- Air pollution levels in cities of east and south India rose on Thursday morning, with Air Quality Index in many places close to 300, primarily because winds carrying pollutants from the northern plains are moving towards the Bay of Bengal.

This means that smoke due to stubble burning in Punjab and Haryana has now reached as far as Chennai.

A Central Pollution Control Board (CPCB) official, who didn't want to be named, said north westerly winds blew the plume of smoke away from the northern plains because of the developing cyclonic depression in the Bay of Bengal.

Although the AQI at Chennai was 257 on Thursday morning, CPCB's real time monitor showed the pollution levels crossing 300 in some locations in the capital ci...